Smoke-consuming furnace.



D. G. WALMSLBY.

SMOKE GONSUMING FURNAGB. APPLICATION FILED APR. 29, 1908.

910,032. Patented Jan.19,1909.

2 SHEETS-SHEET 2.

WITNESSES: INVENTOR 7 7% iii UM vm/ ffi im I BY ATTORNEY D. G. WALMSLEY.

SMOKE OONSUMING FURNACE.

APPLICATION FILED APB. as, 1008.

910,032. Patented Jan. 19. 1909.

2 SHEETS-SHEET 2.

WITNESSES: INVENTOR Y Q MW ATTORNEY Rs cm, WASMINUTDN, n. c.

UNTTEAU PATENT FFT@.

DAVID C. WALMSLEY, OF INDIANAPOLIS, INDIANA.

SMOKE-CONSUMING FURNACE.

Application filed April 29, 1908.

Specification of Letters Patent.

0 all where it may concern:

Be it known that I, Divn) O. lVALMsLnr, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful. Improvements in Smoke-Consui'ning Furnaces, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to a smoke consuming furnace for steam boilers as hereinafter described in the specification and particularly pointed out in the claim.

The object of this invention is to construct a furnace so that the furnace may be fired alternately first. on one side'and then on the other side so that the gases and smoke from the green coal situated at one side of the furnace and passing over into a combustion chamber will be met and intermingled with and consumed by the hot gases issuing from the fuel or coal situated at the other side of the grate.

I attain this object by means of the furnace illustrated in the accompanying drawings in which like numerals designate like parts throughout the several views.

Figure 1 is a longitudinal sectional view taken along lines 11 in Figs. 2, 3, and 1; Fig. 2 is a top sectional view of the same taken along the line 22 in Fig. 1; Fig. 3 is a transverse sectional view taken along the lines 3-3 in Figs. 1 and 2; and, Fig. 1 is a similar view taken along the lines ale-4: in Figs. 1 and 2.

The boiler 1 may be of the regular tubular type having the tubes 2 and the chimney 3, and said boiler is set in the boiler setting composed of the forward wall 1, side walls 5 and 6 and the rear wall 7. The furnace chamber 8, situated between the forward wall 1 of the setting and the bridge wall 9, is provided with the grate bars 10, and beneath the grate 10 is situated the ash pit 11. The fire doors 12 are provided for the purpose of introducing the fires over each side portion of the grate 1O alternately and the ash pit doors 13 are provided for the purpose of removing the ashes from the ash pit 11. That portion of the side walls 5 and 6 situated on each side of the furnace chamber is provided with the hot air ducts 1st which have their inlet end portions situated beneath the level of the grates 10 and said ducts extend upwardly to the air chambers 15 which latter have their open top portion situated above the plane of the top of the grates 10. The cap gratings 16 are fitted into the side recesses formed in the side walls 5 and 6 and are situated between the top inwardly projecting portions 17 and the lower imvardly projecting portions 18 of said side walls, and said caps are provided, on that side situated next to the furnace, with the air outlet openings 19 which are provided for the purpose of admitting the heated air collected in the air chambers 15, into the furnace chamber to commingle with the gases generated therein to promote their combustion. The bridge wall 9, situated at the forward end of the furnace chamber 8, extends up to the bottom of the boiler 1 and is cut away at its sides to form flue-ways 21 between the reduced side portions of said bridge wall and the side walls 5 and 6 of the boiler setting. The bridge wall 9 is provided with a horizontally extending air duct 22 which connects with the vertically extending duct 23, and inlet ducts 24 extend from said ducts 22 to the furnace chamber 8, so that the hot air, contained in the ash pit 11 will flow through the duct 22, thence up through the ducts 23, thence through the outlet ducts 2 1 into the furnace chamber 8 to meet and commingle with the unconsumed gases and smoke in the furnace to promote combustion.

Situated slightly in advance of the bridge wall 9 is the partition wall 25 which extends upwardly to the boiler and connects with the side walls 5 and G of the setting to form a combustion chamber 26, and at the bottom central portion of the partition wall 23 is formed a flue way 27 which connects the combustion chamber 26 with the smoke chamber 28.

I will now proceed to describe the practice of my invention :-Suppose the fire situated on the grate bars be properly lighted and started, then when fresh coal required to be added to the fire, the fireman first opens the fire door situated on that side of the furnace to spread the coal on and to cover that side half portion of the fire with green coal. The heated air, from the ash pit entering the ducts 1 L into the air channels 15 passes through the side openings 19 and similarly the air passes through the ducts 22 to the ducts 23 and through the ducts 24 into the furnace above the grate bars thereof, to con front the gases as they are generated in the furnace, to commingle therewith. The

smoke and unconsumed gases generate on that side of the furnace to which coal has been applied pass through the side opening 21 situated at that side of the furnace which has received its charge of green coal and the heated gases and incandescent fuel situated on the other side or half portion of the grate pass through the side Opening 21 situated at that side of the grate, so that the heated gases escaping into the combus tion chamber 25 meet the unconsumed gases and products of combustion on entering said chamber and ignite them having each received a sufficient supply of oxygen to support perfect combustion. The gases during combustion pass out of the combustion chamber 26 through the flue way 27 into the chamber 28, thence to the tubes 2, through them, into the stack or chimney 3 from whence they escape into the atmosphere.

I claim: 7

In a smoke consuming furnace, the combination with a steam boiler, a furnace chamber, grates in said chamber and doors situated relatively to said grates so that the side half portions of the grates may be charged with fuel alternately, said furnace provided with hot air ducts formed in the side walls of the furnace the inlet ends thereof situated beneath the grates and their outlet portions situated in a plane above the level thereof, caps extending over, the outlet ends of said side ducts and provided with air outlet openings, said openings situated to direct the hot air passing therethrough toward the fire in the furnace chamber, of a bridge wall extending upwardly to connect with the bottom of the boiler of the furnace,hot-air ducts in said bridge walls having their inlet-ends situated below the level of said grates and their outlet ends situated above the level of the grates, a partition wall situatedin advance of said bridge wall to extend between the side walls of the setting of the furnace and upwardly to the boiler, a combustion chamber situated between said bridge wall and said partition, side flue ways situated on each side of said bridge wall connecting the furnace chamber with said combustion chamber and a lower flue way in said forward partition wall connecting the combustion and smoke chambers.

In testimony whereof I afiix my signature in presence of two witnesses.

DAVID C. l VALMSLEY. Witnesses: THOMPSON R. BELL,

FRANoIs M. SPRINGER. 

